import {addResizeListener, removeResizeListener} from 'element-ui/src/utils/resize-event'

/**
 * How to use
 * <el-table height="100px" v-el-height-adaptive-table="{bottomOffset: 30}">...</el-table>
 * el-table height is must be set
 * bottomOffset: 30(default)   // The height of the table from the bottom of the page.
 */

const doResize = (el, binding, vnode) => {
    const {componentInstance: $table} = vnode

    const {value} = binding

    if (!$table.height) {
        throw new Error(`el-$table must set the height. Such as height='100px'`)
    }
    const bottomOffset = (value && value.bottomOffset) || 30

    if (!$table) return

    $table.$nextTick(() => {
        const height = window.innerHeight - el.getBoundingClientRect().top - bottomOffset
        $table.layout.setHeight(height)
        $table.doLayout()
    })
}

export default {
    bind(el, binding, vnode) {
        el.resizeListener = () => {
            doResize(el, binding, vnode)
        }
        // parameter 1 is must be "Element" type
        addResizeListener(window.document.body, el.resizeListener)
    },
    inserted(el, binding, vnode) {
        doResize(el, binding, vnode)
    },
    update(el, binding, vnode) {
        // 如果在更新时的钩子函数中调用doResize，会造成动态显示表格列(template插槽)渲染异常
        // doResize(el, binding, vnode)
    },
    componentUpdated(el, binding, vnode) {
        // 如果在更新时的钩子函数中调用doResize，会造成动态显示表格列(template插槽)渲染异常
        // doResize(el, binding, vnode)
    },
    unbind(el) {
        removeResizeListener(window.document.body, el.resizeListener)
    }
}
